JP2014227883A - Compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem that the followability of a discharge valve is worsened in the case that the area of the head of the discharge valve is sufficiently increased so that the head of the discharge valve can adequately make the discharge valve into a closed state even when the discharge valve is fixed while being inclined.SOLUTION: A compressor includes a cylinder body having a compression chamber, and an end face member mounted on the end face of the cylinder body. The end face member has a recessed part 24 formed in the face on the opposite side to the cylinder body, where the discharge valve is arranged. The discharge valve 31, which is rotated in the recessed part 24 in a predetermined range around a through-hole 23b, has a center part 57 corresponding to the predetermined range near the center at the front end of a head 54 and formed in a circular shape around the through-hole 23b.

Description

  The present invention relates to a compressor such as a rotary compressor used in, for example, an air conditioner.

  A conventional compressor includes a cylinder end face member having a discharge hole opened in the cylinder, a discharge valve that opens and closes the discharge hole of the end face member in a recess of the end face member, and a discharge valve that cooperates with the end face member. And a valve pressing member sandwiching the. The valve pressing member and the discharge valve have through holes, and the discharge valve is fixed in a state of being sandwiched between the end face member and the valve pressing member by rivets inserted into the valve pressing member and the through holes of the discharge valve, respectively. The discharge valve has a fixed portion fixed to the end surface member, a flexible portion extending from the fixed portion, and a head disposed on the distal end side of the flexible portion and opening and closing the discharge hole. .

JP 2010-236564 A

  When the discharge valve is fixed to the end face member, the discharge valve may be rotated and tilted due to assembly. Specifically, when the discharge valve is disposed in the recess of the end face member, the discharge valve rotates in one direction around the fixed portion, and the position where the discharge valve partially contacts the side wall of the recess is changed. It is conceivable that the discharge valve rotates and tilts in a range up to a position where a part of the discharge valve contacts the side wall of the recess by rotating in the direction. When the discharge valve is fixed in an inclined state and the head of the discharge valve cannot properly close the discharge hole, there is a problem that the refrigerant flows backward and the compression efficiency decreases. Therefore, in the conventional compressor, the head of the discharge valve can be closed properly so that the head of the discharge valve can properly close the discharge hole even when the discharge valve rotates and tilts in any direction due to assembly. Is configured to have an area sufficiently larger than the area of the discharge hole. However, in this case, there is a problem in that the follow-up performance of the discharge valve is deteriorated because the head of the discharge valve becomes heavy due to the sufficiently large area of the head of the discharge valve.

  Accordingly, an object of the present invention is to provide a compressor capable of properly closing the discharge hole at the head of the discharge valve even when the discharge valve is tilted due to assembly and suppressing the deterioration of the followability of the discharge valve. Is to provide.

  A compressor according to a first aspect of the present invention includes a cylinder body having a compression chamber and an end surface member attached to an end surface of the cylinder body, and the end surface member has a recess in which a discharge valve is disposed, A discharge hole communicating with the compression chamber, a fixing hole for fixing the discharge valve, and an annular protrusion formed around the discharge hole. The discharge valve is disposed on a distal end side of the flexible portion, a fixed portion that is fixed to the end surface member through the fixing hole, a flexible portion that extends from the fixed portion. And a head part that opens and closes the annular convex part, and at least a part of a tip part of the head part is formed in an arc shape centering on the fixing hole in a plan view.

  In this compressor, even if the discharge valve is fixed in an inclined state with respect to the end face member due to assembly, the tip of the head of the discharge valve is configured so that the annular convex portion can be properly closed. Has been. And the area of the front-end | tip part of the head part of a discharge valve is comprised small in the range which can close an annular convex part appropriately even when a discharge valve inclines. Therefore, even when the discharge valve is tilted due to assembly, the head of the discharge valve can properly close the discharge hole, and deterioration of the followability of the discharge valve can be suppressed.

  In the compressor according to the second invention, in the compressor according to the first invention, in a state before the discharge valve is disposed in the recess and fixed to the end face member, the discharge valve is in the recess. In which the portion corresponding to the predetermined range near the center of the tip of the head is configured in an arc shape centered on the fixed hole. Features.

  In this compressor, even when the discharge valve is fixed in an inclined state with respect to the end face member due to assembly, the area of the tip of the discharge valve head can be properly closed so that the annular convex portion can be closed properly. Is configured to be small.

  In the compressor according to the third invention, in the compressor according to the second invention, in the state before the discharge valve is disposed in the recess and fixed to the end face member, the discharge valve in plan view Rotates around the fixed hole and one side surface of the head moves by a predetermined amount toward the center line side of the discharge valve, at least a part of the side surface of the discharge valve abuts against the side wall of the recess At the same time, the one side surface of the head is opposed to a portion on the upstream side in the rotational direction of the annular convex portion.

  In this compressor, the head of the discharge valve is configured so that the annular convex portion can be properly closed even when the discharge valve is fixed in an inclined state with respect to the end face member due to assembly. Has been. The area of the head of the discharge valve is small in a range in which the annular convex portion can be properly closed even when the discharge valve is most inclined in one direction. Therefore, even when the discharge valve is tilted due to assembly, the head of the discharge valve can properly close the discharge hole, and deterioration of the followability of the discharge valve can be suppressed.

  In the compressor concerning 4th invention, at least one part of the side surface of the said discharge valve is a side surface of the said fixing | fixed part in the compressor concerning any 1st-3rd invention.

  In this compressor, the flexible part and the head of the discharge valve are parts that move, and the discharge valve moves when the flexible part and the side of the head are in contact with the side wall of the recess. Although the discharge valve fixing part is a part that does not move, it does not interfere with the operation of the discharge valve even when the side surface of the fixing part of the discharge valve is fixed in contact with the side wall of the recess. .

  In the compressor concerning 5th invention, at least one of the both sides | surfaces of the said head has a linear part in the compressor concerning any 1st-4th invention, It is characterized by the above-mentioned.

  In this compressor, when the discharge hole has an elliptical shape, even when the discharge valve is fixed in a direction inclined with respect to the end face member by assembly, the annular convex portion is properly closed. It is possible to suppress the deterioration of the followability of the discharge valve. Further, when the discharge valve has a hole, and the discharge valve is fixed to the end surface member via the hole and the fixing hole of the end surface member, the hole of the discharge valve is larger than the fixing hole of the end surface member. In some cases, the discharge valve may be fixed in a state shifted to the discharge hole side. In this invention, even if it is a case where the discharge valve is fixed in the state shifted | deviated to the discharge hole side, while being able to make an annular convex part closed properly, it can suppress that the followable | trackability of a discharge valve deteriorates.

  In the compressor concerning 6th invention, the said discharge hole is an elliptical shape in the compressor concerning any 1st-5th invention, It is characterized by the above-mentioned.

  In this compressor, the head of the discharge valve can properly close the discharge hole even when the discharge hole is configured in an elliptical shape or the discharge valve is inclined due to assembly, and the followability of the discharge valve Can be suppressed.

  In the compressor concerning 7th invention, the said fixing | fixed part is fixed to the said end surface member with a rivet in the compressor concerning any 1st-6th invention, It is characterized by the above-mentioned.

  In this compressor, when the fixed part of the discharge valve is fixed to the end face member with a screw, it is considered that the direction in which the discharge valve rotates and tilts coincides with the rotational direction of the screw. When fixed to the end face member by rivets, it is conceivable that the discharge valve is fixed in a state of being rotated and inclined in any direction. According to the present invention, even in this case, even when the discharge valve is tilted due to assembly, the head of the discharge valve can properly close the discharge hole, and deterioration of the followability of the discharge valve can be suppressed.

  As described above, according to the present invention, the following effects can be obtained.

  In the first invention, even when the discharge valve is fixed in an inclined state with respect to the end face member by assembling, the tip of the head of the discharge valve is arranged so that the annular convex portion can be properly closed. It is configured. And the area of the front-end | tip part of the head part of a discharge valve is comprised small in the range which can close an annular convex part appropriately even when a discharge valve inclines. Therefore, even when the discharge valve is tilted due to assembly, the head of the discharge valve can properly close the discharge hole, and deterioration of the followability of the discharge valve can be suppressed.

  In the second aspect of the invention, even when the discharge valve is fixed in an inclined state with respect to the end face member by assembly, the tip of the head of the discharge valve can be properly closed so that the annular convex portion can be properly closed. The area is small.

  In the third aspect of the invention, even when the discharge valve is fixed in a direction inclined with respect to the end face member by assembling, the head of the discharge valve can be properly closed so that the annular convex portion can be properly closed. It is configured. The area of the head of the discharge valve is small in a range in which the annular convex portion can be properly closed even when the discharge valve is most inclined in one direction. Therefore, even when the discharge valve is tilted due to assembly, the head of the discharge valve can properly close the discharge hole, and deterioration of the followability of the discharge valve can be suppressed.

  In the fourth aspect of the invention, the flexible portion and the head of the discharge valve are parts that operate, and the discharge valve is fixed when the flexible portion and the side surface of the head are in contact with the side wall of the recess. Although it may be difficult to move, the fixed part of the discharge valve is a part that does not move, so even if the side surface of the fixed part of the discharge valve is fixed in contact with the side wall of the recess, the operation of the discharge valve is hindered. Absent.

  In the fifth invention, in the case where the discharge hole is configured in an elliptical shape, even when the discharge valve is fixed in a state tilted in one direction with respect to the end face member by assembly, the annular convex portion is properly formed. While being able to be in a closed state, it can suppress that the followable | trackability of a discharge valve worsens. Further, when the discharge valve has a hole, and the discharge valve is fixed to the end surface member via the hole and the fixing hole of the end surface member, the hole of the discharge valve is larger than the fixing hole of the end surface member. In some cases, the discharge valve may be fixed in a state shifted to the discharge hole side. In this invention, even if it is a case where the discharge valve is fixed in the state shifted | deviated to the discharge hole side, while being able to make an annular convex part closed properly, it can suppress that the followable | trackability of a discharge valve deteriorates.

  In the sixth invention, even when the discharge hole is configured in an elliptical shape or the discharge valve is inclined due to assembly, the head of the discharge valve can properly close the discharge hole and follow the discharge valve. It is possible to suppress the deterioration of sex.

  In the seventh invention, when the fixing portion of the discharge valve is fixed to the end face member with a screw, it is considered that the direction in which the discharge valve rotates and tilts coincides with the rotation direction of the screw. Is fixed to the end face member by rivets, the discharge valve may be fixed in a state of being rotated and inclined in any direction. According to the present invention, even in this case, even when the discharge valve is tilted due to assembly, the head of the discharge valve can properly close the discharge hole, and deterioration of the followability of the discharge valve can be suppressed.

It is a sectional view of the compressor concerning a 1st embodiment of the present invention. It is a top view of the cylinder main body of the compressor of FIG. It is sectional drawing of the compressor of FIG. It is a principal part expanded sectional view of the compressor of FIG. Fig.5 (a) is a top view of the discharge valve of the compressor of FIG. 1, FIG.5 (b) is a top view of the discharge valve of the conventional compressor. It is a top view which shows the state by which the discharge valve was fixed in the compressor of FIG. It is a top view of the cylinder main body of the compressor concerning a 2nd embodiment of the present invention. Fig.8 (a) is a top view of the discharge valve of the compressor of FIG. 7, FIG.8 (b) is a top view of the discharge valve of the conventional compressor. It is a top view which shows the state by which the discharge valve was fixed in the compressor of FIG. It is a top view which shows the state by which the discharge valve was fixed in the compressor of FIG. It is a top view of the cylinder main body of the compressor concerning a 3rd embodiment of the present invention. 12A is a plan view of the discharge valve of the compressor of FIG. 11, and FIG. 12B is a plan view of the discharge valve of the conventional compressor. It is a top view which shows the state by which the discharge valve was fixed in the compressor of FIG.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

(First embodiment)
FIG. 1 is a sectional view showing an embodiment of the compressor of the present invention. This compressor is a so-called high pressure dome type rotary compressor, and has a casing 1 with a compression mechanism 2 on the bottom and a motor 3 on the top. The rotor 6 of the motor 3 drives the compression mechanism 2 via the drive shaft 12.

  The compression mechanism 2 sucks gas (refrigerant) from the accumulator 10 through the suction pipe 11. This gas is obtained by controlling a condenser, an expansion mechanism, and an evaporator (not shown) constituting an air conditioner as an example of a refrigeration system together with the compressor.

  The compressor discharges compressed high-temperature and high-pressure discharge gas from the compression mechanism 2 and fills the inside of the casing 1, and after cooling the motor 3 through the gap between the stator 5 and the rotor 6 of the motor 3, The discharge pipe 13 discharges to the outside. Lubricating oil 9 is stored in the lower portion of the high pressure region in the casing 1.

  As shown in FIGS. 1 and 2, the compression mechanism 2 includes a cylinder body 21 that forms a cylinder chamber 22, and an upper side that is attached to the upper and lower end surfaces of the cylinder body 21 and covers the compression chamber (cylinder chamber) 22. An end face member 23 and a lower end face member 24 are provided. The drive shaft 12 passes through the upper end face member 23 and the lower end face member 24 and enters the compression chamber 22. A roller 27 fitted to a crank pin 26 provided on the drive shaft 12 is disposed in the compression chamber 22 so as to be able to revolve, and a compression action is performed by the revolving motion of the roller 27.

  The compression chamber 22 is partitioned by a blade 28 provided integrally with the roller 27. That is, as shown in FIG. 2, in the chamber on the right side of the blade 28, the suction pipe 11 opens on the inner surface of the compression chamber 22 to form a suction chamber 22 a. On the other hand, in the chamber on the left side of the blade 28, the discharge hole 23 a shown in FIG. 1 opens on the inner peripheral surface of the compression chamber 22 to form a discharge chamber 22 b. A semicircular bush is in close contact with both surfaces of the blade 28 for sealing. Lubricating is performed with the lubricating oil 9 between the blade 28 and the bush.

  The operation of the compression mechanism 2 will be described. The crank pin 26 rotates eccentrically with the drive shaft 12, and the roller 27 fitted to the crank pin 26 makes the outer peripheral surface of the roller 27 the inner peripheral surface of the compression chamber 22. Revolve in contact. As the roller 27 revolves in the compression chamber 22, the blade 28 advances and retreats with both side surfaces of the blade 28 held by bushes. Then, a low-pressure refrigerant is sucked into the suction chamber 22a from the suction pipe 11, compressed in the discharge chamber 22b to a high pressure, and then the high-pressure refrigerant is discharged from the discharge hole 23a.

  As shown in FIGS. 3 and 4, the upper end surface of the end surface member 23 is provided with a recess (depression) 24. A plate-like discharge valve 31 and a plate-like valve pressing member 32 are provided in the recess 24 of the end surface member 23. The recess 24 of the end face member 23 is provided with an elliptical discharge hole 23a communicating with the compression chamber 22 and a through hole 23b disposed in the vicinity of the discharge hole 23a. And the annular convex part 25 is arrange | positioned around the discharge hole 23a in a recessed part. The upper end of the annular convex portion 25 has a substantially semicircular cross section, and is highest at the central portion of the annular convex portion 25. Therefore, the central part of the annular convex part 25 is the top part 25 a of the annular convex part 25. In FIG. 3, illustration of some members such as the valve pressing member 32 is omitted, and the top portion 25 a of the annular convex portion 25 is illustrated by a two-dot chain line.

  The discharge valve 31 is a member that opens and closes the annular convex portion 25 around the discharge hole 23 a, and the valve pressing member 32 is a member that sandwiches the discharge valve 31 in cooperation with the end surface member 23. The discharge valve 31 has a hole 31a, and the valve pressing member 32 has a hole 32a. The hole 31a and the hole 32a are substantially the same size as the through hole 23b. The recess 24 of the end face member 23 has a side wall 24a and a side wall 24b that are substantially opposed to each other. The side wall 24a and the side wall 24b extend from the through hole 23b to the discharge hole 23a side. And the side wall 24a and the side wall 24b of the recessed part 24 are located in the both sides of this site | part so that the site | part around each rivet 33 of the discharge valve 31 and the valve pressing member 32 may be positioned substantially.

  The discharge valve 31 and the valve pressing member 32 are fixed to the end surface member 23 by a rivet 33. The rivet 33 is inserted into the hole portion 31 a of the discharge valve 31 and the hole portion 32 a of the valve pressing member 32 and is also inserted into the through hole 23 b of the end surface member 23, so that the discharge valve 31 is connected to the end surface member 23 and the valve pressing member 32. Fix it in the state of being pinched by.

  In the free state, the discharge valve 31 closes the annular convex portion 25 around the discharge hole 23a. On the other hand, when the refrigerant (compressed gas) in the compression chamber 22 reaches a predetermined pressure, the discharge valve 31 is elastically deformed so as to leave the annular convex portion 25, and the compressed gas is discharged from the discharge hole 23a. . The valve pressing member 32 suppresses the movement of the discharge valve 31 so that the discharge valve 31 is not deformed (oscillated) more than necessary.

  A cup-type muffler body 40 is attached to the end surface member 23 so as to cover the discharge valve 31. The muffler main body 40 is fixed to the end surface member 23 by a fixing member such as a bolt. A muffler chamber 41 is formed by the muffler main body 40 and the end face member 23. The muffler chamber 41 and the cylinder chamber 22 communicate with each other through the discharge hole 23a. The muffler main body 40 has a hole, and the muffler chamber 41 communicates with the space in the casing 1 through the hole.

  As shown in FIG. 5A, the discharge valve 31 includes a fixed portion 52 that is fixed to the through hole 23 b of the end surface member 23 via the hole portion 31 a and a flexible portion 53 that extends from the fixed portion 52. And a head 54 disposed on the distal end side of the flexible portion 53 and facing the annular convex portion 25. 5A and 6A to 6C, description will be made assuming that the center position of the hole 31a of the discharge valve 31 coincides with the center position of the through hole 23b of the end face member 23. FIG.

  The fixing portion 52 has a hole portion 31 a and is a portion fixed to the end surface member 23 between the side wall 24 a and the side wall 24 b of the recess 24. The width of the fixing portion 52 (the vertical width in FIG. 5A) is configured to be slightly smaller than the distance between the side wall 24a and the side wall 24b of the recess 24 in consideration of assembly errors.

  The flexible portion 53 is configured to be narrower than the fixed portion 52, and is a portion that is bent and elastically deformed when the refrigerant in the compression chamber 22 reaches a predetermined pressure.

  The head 54 is configured to be wider than the flexible portion 53, and is a portion that opens and closes the annular convex portion 25 around the discharge hole 23a. In plan view, one side surface 54a of the head 54 has a first straight portion 55 that is inclined away from the center line of the discharge valve 31 toward the tip, and the other side surface 54b of the head 54 is The second straight portion 56 is inclined so as to move away from the center line of the discharge valve 31 toward the tip. Further, in a plan view, the central portion 57 of the distal end portion of the head portion 54 is formed in an arc shape with the hole portion 31a (through hole 23b) as the center.

  As described above, the discharge hole 23a has an elliptical shape. 6 (a) to 6 (c), the discharge valve 31 is disposed in the recess 24 so that the hole 31a faces the through hole 23b of the end surface member 23, and is fixed to the end surface member 23. Although the illustration of some members such as the valve pressing member 32 is omitted, the position corresponding to the top portion 25a of the elliptical annular convex portion 25 is illustrated by a two-dot chain line. . As shown in FIG. 6 (b), when the center line of the discharge valve 31 coincides with a straight line passing through the center of the through hole 23b of the end surface member 23 and the center of the elliptical discharge hole 23a in plan view, It is considered that the discharge valve 31 is properly arranged with respect to the end face member 23. When the discharge valve 31 is fixed in this state, since the discharge valve 31 is in an appropriate fixing position (a position where the discharge valve 31 is not tilted), the head 54 properly closes the annular convex portion 25 having an elliptical shape. Can be in a state.

  On the other hand, as shown in FIG. 6A, the direction in which the discharge valve 31 rotates around the hole 31 a (through hole 23 b) and the first straight portion 55 of the head 54 moves away from the drive shaft 12 in a plan view. (When the first straight portion 55 of the head portion 54 moves from the proper fixing position to the center line side of the discharge valve 31 by a predetermined amount), the side surface of the fixing portion 52 is the side walls 24a and 24b of the recess 24. , The rotation of the discharge valve 31 is restricted. When the discharge valve 31 is in a position where it does not rotate in the above-described direction, the first straight portion 55 of the head portion 54 faces the top portion 25a on the upstream side in the rotational direction of the annular convex portion 25. The length of the first straight portion 55 of the head 54 is configured to be approximately the same as the length of the straight portion along the long axis of the top portion 25a of the elliptical annular convex portion 25. When the discharge valve 31 is fixed in this state, the discharge valve 31 is not fixed at the proper fixing position, but the head 54 of the discharge valve 31 is fixed in a state of being inclined in a direction away from the drive shaft 12. The annular convex part 25 whose head 54 is elliptical can be properly closed.

  Further, as shown in FIG. 6C, the direction in which the discharge valve 31 rotates around the hole 31 a (through hole 23 b) and the second linear portion 56 of the head 54 approaches the drive shaft 12 in plan view, as shown in FIG. (When the second straight portion 56 of the head portion 54 moves from the appropriate fixing position to the center line side of the discharge valve 31 by a predetermined amount), the side surface of the fixing portion 52 is the side walls 24a, 24b of the recess 24. , The rotation of the discharge valve 31 is restricted. And when the discharge valve 31 exists in the position which does not rotate in said direction, the 2nd linear part 56 of the head 54 is comprised so that the top part 25a of the rotation direction upstream of the cyclic | annular convex part 25 may be opposed. The length of the second straight portion 56 of the head 54 is configured to be substantially the same as the length of the straight portion along the long axis of the top portion 25a of the elliptical annular convex portion 25. When the discharge valve 31 is fixed in this state, the discharge valve 31 is not fixed at an appropriate fixing position, but the head 54 of the discharge valve 31 is fixed in a state of being inclined in a direction approaching the drive shaft 12. The annular convex part 25 whose head 54 is elliptical can be properly closed.

  Further, as shown in FIG. 6A, the discharge valve 31 rotates around the hole 31a (through hole 23b) and the first straight portion 55 of the head 54 moves away from the drive shaft 12. In this case, one end portion (the lower end portion in FIG. 6) of the central portion 57 at the distal end portion of the head portion 54 opposes the top portion 25a of the annular convex portion 25 on the side away from the through hole 23b. In addition, as shown in FIG. 6C, when the second straight part 56 of the head 54 moves in a direction approaching the drive shaft 12 by rotating around the hole 31a (through hole 23b), the head The other end portion (the upper end portion in FIG. 6) of the central portion 57 at the front end portion of 54 faces the top portion 25a of the annular convex portion 25 on the side away from the through hole 23b. Therefore, it is conceivable that the discharge valve 31 tilts in a predetermined range between the position shown in FIG. 6A and the position shown in FIG. 6C. The central portion 57 of the tip portion is configured to face the top portion 25a of the annular convex portion 25 on the side away from the through hole 23b. Accordingly, the annular convex portion 25 having the elliptical head portion 54 can be properly closed. The length of the central portion 57 configured in an arc shape at the tip of the head 54 is such that the discharge valve 31 is inclined when the head 54 moves away from the drive shaft 12 and the head 54 is The length is based on the inclination when moving in the direction approaching the drive shaft 12.

<Characteristics of the compressor of this embodiment>
In the compressor of the present embodiment, since the central portion 57 of the distal end portion of the head portion 54 of the discharge valve 31 is formed in an arc shape with the fixing hole 23b as the center, the discharge valve 31 is end-face member 23 by assembly. Even when fixed in a tilted state, the annular convex portion can be properly closed, and the area of the tip of the head 54 of the discharge valve 31 is made small. Therefore, even when the discharge valve 31 is inclined due to assembly, the head 54 of the discharge valve 31 can properly close the discharge hole 23a, and the follow-up performance of the discharge valve 31 can be suppressed from being deteriorated.

  5A shows the discharge valve 31 of the compressor of the present invention, while FIG. 5B shows the discharge valve 61 of the conventional compressor. As shown in FIG. 5 (b), the head of the discharge valve 61 has an elliptical shape substantially similar to the shape of the elliptical discharge hole (the top of the annular convex portion), and the elliptical convex portion It can be seen that the area of the head 54 of the discharge valve 31 in FIG. 5 (a) is small compared to the case where the area is sufficiently larger than the area of the top.

  Further, in the compressor of the present embodiment, the discharge valve 31 rotates within a predetermined range around the fixing hole 23b in the recess 24, and the center corresponding to the predetermined range near the center of the tip of the head 54 Since the portion 57 is formed in an arc shape centered on the fixing hole 23b, the annular convex portion can be properly closed even when the discharge valve is fixed in an inclined state with respect to the end face member due to assembly. The area of the tip of the discharge valve head is configured to be small

  Moreover, in the compressor of this embodiment, even when the discharge valve 31 is fixed in a state inclined in one direction with respect to the end surface member 23 by assembly, the annular convex portion 25 can be properly closed. The head 54 of the discharge valve 31 is configured. The area of the head 54 of the discharge valve 31 is configured to be small within a range in which the annular convex portion 25 can be properly closed even when the discharge valve 31 is inclined most greatly in one direction. Therefore, even when the discharge valve 31 is inclined due to assembly, the head 54 of the discharge valve 31 can properly close the discharge hole 23a, and the follow-up performance of the discharge valve 31 can be suppressed from being deteriorated.

  Further, in the compressor according to the present embodiment, the rotation of the discharge valve 31 is restricted by the side surfaces of the fixed portion 52 of the discharge valve 31 coming into contact with the side walls 24a and 24b of the recess 24, so that the discharge valve 31 moves. The side surfaces of the flexible portion 53 and the head portion 54, which are portions, abut against the side walls 24a and 24b of the recess 24, so that the discharge valve 31 is less likely to move than when the rotation of the discharge valve 31 is restricted. Is suppressed.

  Moreover, in the compressor of this embodiment, since the 1st linear part 55 of the head 54 of the discharge valve 31 is comprised substantially the same as the length of the linear part along the major axis of the top part 25a of the cyclic | annular convex part 25. FIG. In the case where the discharge hole 23a is configured in an elliptical shape, even when the discharge valve 31 is fixed to the end face member 23 in a state where the head 54 is inclined in a direction away from the drive shaft 12 due to assembly. The annular convex portion 25 can be properly closed, and the follow-up performance of the discharge valve 31 can be suppressed from deteriorating. Further, since the hole 31a of the discharge valve 31 is larger than the fixing hole 23b of the end face member 23, the discharge valve 31 may be fixed in a state of being displaced toward the discharge hole 23a. The convex portion 25 can be properly closed, and the follow-up performance of the discharge valve 31 can be suppressed from deteriorating.

  Moreover, in the compressor of this embodiment, although the discharge hole 31 is comprised by the ellipse shape, even when the discharge valve 31 inclines by assembly, the head 54 of the discharge valve 31 closes the discharge hole 23a appropriately. While being able to be in a state, it can suppress that the followable | trackability of the discharge valve 31 worsens.

  Moreover, in the compressor of this embodiment, the fixing | fixed part 52 of the discharge valve 31 is being fixed with respect to the end surface member 23 by the rivet 33, and the discharge valve 31 is fixed in the state which rotated and inclined in any direction. However, the head 54 of the discharge valve 31 can properly close the discharge hole 23a even when the discharge valve 31 is inclined in any direction due to assembly, and the followability of the discharge valve 31 can be improved. It can suppress getting worse.

(Second Embodiment)
7 to 10 show a second embodiment of the present invention. In the compressor of the first embodiment, the discharge hole 23a has an elliptical shape, whereas in the second embodiment, the discharge hole 123a has a circular shape, and accordingly, the head of the discharge valve. The shape is different. Since other configurations are substantially the same as those in the first embodiment, the description thereof is omitted.

  As shown in FIG. 7, a concave portion (recessed portion) 124 is provided on the upper end surface of the end surface member 123. A plate-like discharge valve 131 and a plate-like valve pressing member 32 are arranged in the recess 124 of the end surface member 123. In addition, the concave portion 124 of the end face member 123 is provided with a circular discharge hole 123a communicating with the compression chamber 22 and a through hole 23b provided in the vicinity of the discharge hole 123a. An annular convex portion 125 is disposed around the discharge hole 123 a in the concave portion 124. The upper end of the annular protrusion 125 has a substantially semicircular cross section, and is highest at the center of the annular protrusion 125. Therefore, the central portion of the annular convex portion 125 is the top portion 125 a of the annular convex portion 125.

  The discharge valve 131 is a member that opens and closes the annular convex portion 125 around the discharge hole 123a. The discharge valve 131 has a hole 131a. The hole 131a is slightly larger than the through hole 23b. The concave portion 124 of the end surface member 123 has a side wall 124a and a side wall 124b that are substantially opposed to each other.

  As shown in FIG. 8A, the discharge valve 131 includes a fixed portion 152 that is fixed to the through hole 23b of the end surface member 123 via the hole portion 131a, a flexible portion 153 that extends from the fixed portion 152, It has a head portion 154 that is disposed on the distal end side of the flexible portion 153 and faces the annular convex portion 125. 8A and 9A to 9C, description will be made assuming that the center position of the hole 131a of the discharge valve 131 is coincident with the center position of the through hole 23b of the end face member 123.

  The fixing part 152 has a hole part 131a and is a part fixed to the end face member 123 between the side wall 124a and the side wall 124b of the recess 124. The width of the fixed portion 152 (the vertical width in FIG. 8A) is configured to be slightly smaller than the distance between the side wall 124a and the side wall 124b of the recess 124 in consideration of assembly errors.

  The flexible portion 153 is configured to be narrower than the fixed portion 152, and is a portion that is bent and elastically deformed when the refrigerant in the compression chamber 22 reaches a predetermined pressure.

  The head portion 154 is configured to be wider than the flexible portion 153, and is a portion that opens and closes the annular convex portion 125 around the discharge hole 123a. In plan view, one side surface 154a of the head 154 has a first straight portion 155 that is inclined away from the center line of the discharge valve 131 toward the tip, and the other side surface 154b of the head 154 is The second straight portion 156 is inclined so as to move away from the center line of the discharge valve 131 toward the tip. Further, in a plan view, the central portion 157 at the tip of the head 154 is formed in an arc shape centered on the hole 131a (through hole 23b).

  The discharge hole 123a is configured in a circular shape as described above. 9 (a) to 9 (c) and 10 (a) to 10 (c), the discharge valve 131 is formed in the recess 124 so that the hole 131a faces the through hole 23b of the end surface member 123. Although not shown in the drawing, some members such as the valve pressing member 32 are omitted and the top 125a of the circular annular convex portion 125 is shown. Corresponding positions are indicated by two-dot chain lines. 9A to 9C show a case where the center of the hole 131a of the discharge valve 131 coincides with the center of the through hole 23b, and FIGS. The discharge valve 131 shows a case where the center of the hole 131a is shifted from the center of the through hole 23b in a direction approaching the discharge hole 123a.

  As shown in FIGS. 9A to 9C, the case where the discharge valve 131 is fixed so that the center of the hole 131a coincides with the center of the through hole 23b will be described. As shown in FIG. 9B, when the center line of the discharge valve 131 coincides with a straight line passing through the center of the through hole 23b of the end face member 123 and the center of the circular discharge hole 123a in plan view, It is considered that the discharge valve 131 is properly disposed with respect to the end face member 123. When the discharge valve 131 is fixed in this state, the discharge valve 131 is fixed at an appropriate fixing position (a position where the discharge valve 131 is not tilted), so that the head 154 has an appropriate circular annular convex portion 125. Can be closed.

  On the other hand, as shown in FIG. 9A, the direction in which the discharge valve 131 rotates about the hole 131 a (through hole 23 b) and the first straight portion 155 of the head 154 moves away from the drive shaft 12 in a plan view. (When the first straight portion 155 of the head 54 moves by a predetermined amount from the proper fixing position to the center line side of the discharge valve 131), the side surface of the fixing portion 152 is the side walls 124a and 124b of the recess 124. , The rotation of the discharge valve 131 is restricted. When the discharge valve 131 is in a position where it does not rotate in the above-described direction, the first straight portion 155 of the head 154 faces the top portion 125a on the upstream side in the rotation direction of the annular convex portion 125. When the discharge valve 131 is fixed in this state, the discharge valve 131 is not attached to the proper fixing position, and the head 154 of the discharge valve 131 is attached in a state of being inclined away from the drive shaft 12. However, the annular convex portion 125 having the circular head portion 154 can be properly closed.

  9C, the discharge valve 131 rotates about the hole 131a (through hole 23b) and the second straight portion 156 of the head 154 approaches the drive shaft 12 in plan view. (When the second straight portion 156 of the head 154 moves from the proper fixing position to the center line side of the discharge valve 131 by a predetermined amount), the side surface of the fixing portion 152 is the side walls 124a, 124b of the recess 124. , The rotation of the discharge valve 131 is restricted. When the discharge valve 131 is in a position where it does not rotate in the above direction, the second straight portion 156 of the head 154 is configured to face the top portion 125a on the upstream side in the rotational direction of the annular convex portion 125. When the discharge valve 131 is fixed in this state, the discharge valve 131 is not attached to the proper fixing position, and the head 154 of the discharge valve 131 is attached in a state of being inclined toward the drive shaft 12. However, the annular convex part 125 whose head part 154 has an elliptical shape can be appropriately closed.

  Further, as shown in FIG. 9A, when the discharge valve 131 rotates around the hole 131a (through hole 23b) and the head 154 moves in a direction away from the drive shaft 12, the head 154 One end portion (the end portion on the lower side in FIG. 9) of the center portion 157 of the front end portion of the ring-shaped convex portion 125 faces the top portion 125 a on the side away from the through hole 23 b of the annular convex portion 125. Further, as shown in FIG. 9C, when the head 154 moves in the direction approaching the drive shaft 12 by rotating around the hole 131a (through hole 23b), the center of the tip of the head 154 is centered. The other end portion (the upper end portion in FIG. 9) of the portion 157 faces the top portion 125a on the side away from the through hole 23b of the annular convex portion 25. When the discharge valve 131 is in a predetermined range between the position shown in FIG. 9 (a) and the position shown in FIG. 9 (c), the central portion 157 at the tip of the head 154 always has an annular convex portion. It is comprised so that the top part 125a of the side away from the through-hole 23b of 125 may be opposed. Therefore, the annular convex portion 125 having a circular head portion 154 can be properly closed. The length of the central portion 157 formed in an arc shape at the tip of the head 154 is such that the discharge valve 131 is inclined when the head 154 moves away from the drive shaft 12 and the head 154 is The length is based on the inclination when moving in the direction approaching the drive shaft 12.

  As shown in FIGS. 10A to 10C, the discharge valve 131 is fixed in a state where the center of the hole 131a is shifted from the center of the through hole 23b in a direction approaching the discharge hole 123a. explain. As shown in FIG. 10B, when the center line of the discharge valve 131 coincides with the straight line passing through the center of the through hole 23b of the end face member 123 and the center of the circular discharge hole 123a in plan view. The center of the hole 131a of the discharge valve 131 is shifted from the center of the through hole 23b. When the discharge valve 131 is fixed in this state, the discharge valve 131 is in the proper fixing position (the discharge valve 131 is The head 154 can properly close the circular annular convex portion 125 in a closed state.

  On the other hand, as shown in FIG. 10A, the center of the hole 131a of the discharge valve 131 is shifted from the center of the through hole 23b in a direction approaching the discharge hole 123a, and the discharge valve 131 moves through the through hole 23b in plan view. When the first straight portion 155 of the head 154 moves away from the drive shaft 12 by rotating around the center (from the proper fixed position, the first straight portion 155 of the head 154 is located on the center line side of the discharge valve 131. When the fixed amount is moved), the rotation of the discharge valve 131 is restricted by the side surface of the fixed portion 152 coming into contact with the side walls 124a and 124b of the recess 124. When the discharge valve 131 is in a position where it does not rotate in the above-described direction, the first straight portion 155 of the head 154 faces the top portion 125a on the upstream side in the rotation direction of the annular convex portion 125. When the discharge valve 131 is fixed in this state, the center of the hole 131a of the discharge valve 131 is shifted from the center of the through hole 23b, and the discharge valve 131 is not fixed at the proper fixing position. Although the head 154 of the valve 131 is fixed in a state of being inclined in a direction away from the drive shaft 12, the head 154 can properly close the circular annular convex portion 125.

  As shown in FIG. 10C, the center of the hole 131a of the discharge valve 131 is shifted from the center of the through hole 23b in a direction approaching the discharge hole 123a, and the discharge valve 131 moves through the through hole 23b in plan view. When the second straight portion 156 of the head 154 moves in the direction approaching the drive shaft 12 by rotating as the center (from the proper fixing position, the second straight portion 156 of the head 154 is located on the center line side of the discharge valve 131. When the fixed amount is moved), the rotation of the discharge valve 131 is restricted by the side surface of the fixed portion 152 coming into contact with the side walls 124a and 124b of the recess 124. When the discharge valve 131 is in a position where it does not rotate in the above direction, the second straight portion 156 of the head 154 is configured to face the top portion 125a on the upstream side in the rotational direction of the annular convex portion 125. When the discharge valve 131 is fixed in this state, the center of the hole 131a of the discharge valve 131 is shifted from the center of the through hole 23b, and the discharge valve 131 is not fixed at the proper fixing position. Although the head 154 of the valve 131 is fixed in a state of being inclined in a direction approaching the drive shaft 12, the head 154 can appropriately close the elliptical annular convex portion 125.

  Therefore, the length of the first straight portion 155 and the length of the second straight portion 156 of the head 154 are different depending on the size of the hole 131a of the discharge valve 131 and the through hole 23b of the end face member 123. When the valve 131 is fixed, the discharge valve 131 is configured based on a deviation amount that is considered to shift to the discharge hole 123a side.

  Further, as shown in FIG. 10A, when the discharge valve 131 rotates about the through hole 23b and the head 154 moves away from the drive shaft 12, the center of the tip of the head 154 is centered. One end portion (the lower end portion in FIG. 10) of the portion 157 faces a portion outside the top portion 125 a on the side away from the through hole 23 b of the annular convex portion 125. Further, as shown in FIG. 10C, when the second straight portion 56 of the head 154 moves in the direction approaching the drive shaft 12 by rotating around the through hole 23b, the tip of the head 154 The other end portion (the upper end portion in FIG. 10) of the central portion 157 faces a portion outside the top portion 125a on the side away from the through hole 23b of the annular convex portion 25. Therefore, when the discharge valve 131 is in a predetermined range between the position shown in FIG. 10A and the position shown in FIG. 10C, the central portion 157 of the tip portion of the head 154 is always annular. It is comprised so that the part outside the top part of the convex part 125 away from the through-hole 23b may be opposed.

<Characteristics of the compressor of this embodiment>
In the compressor of this embodiment, the same effect as the compressor of the first embodiment is obtained.

  8A shows the discharge valve 131 of the compressor of the present invention, while FIG. 8B shows the discharge valve 161 of the conventional compressor. As shown in FIG. 8B, the head of the discharge valve 161 has a circular shape substantially similar to the shape of the circular discharge hole (the top of the annular convex portion), and the circular annular convex portion It can be seen that the area of the head 154 of the discharge valve 131 in FIG. 8A is small compared to the case where the area is sufficiently larger than the area of the top.

(Third embodiment)
11 to 13 show a third embodiment of the present invention. The compressor according to the first embodiment and the compressor according to the third embodiment are different in the arrangement of the elliptical discharge holes with respect to the drive shaft. Accordingly, in the first embodiment, the head 54 of the discharge valve 23 is In contrast to the third embodiment, the head portion 254 of the discharge valve 223 is disposed to be inclined with respect to the flexible portion 253, whereas the flexible portion 53 is not inclined. Since other configurations are substantially the same as those in the first embodiment, the description thereof is omitted.

  As shown in FIG. 11, a recess (dent) 224 is provided on the upper end surface of the end surface member 223. A plate-like discharge valve 231 and a plate-like valve pressing member 32 are disposed in the recess 224 of the end surface member 223. The recess 224 of the end face member 223 is provided with an elliptical discharge hole 223a communicating with the compression chamber 22 and a through hole 23b disposed in the vicinity of the discharge hole 223a. An annular convex portion 225 is disposed around the discharge hole 223a in the concave portion 224. The upper end of the annular convex portion 225 has a substantially semicircular cross section, and is highest at the central portion of the annular convex portion 225. Therefore, the central part of the annular convex part 225 is the top part 225 a of the annular convex part 225.

  The discharge valve 231 is a member that opens and closes the annular convex portion 225 around the discharge hole 223a. The discharge valve 231 has a hole 231a. The hole portion 231a has substantially the same size as the through hole 23b. The recess 224 of the end surface member 223 has a side wall 224a and a side wall 224b that are substantially opposed to each other.

  As shown in FIG. 12A, the discharge valve 231 includes a fixed portion 252 fixed to the through hole 23b of the end surface member 223 via the hole portion 231a, a flexible portion 253 extending from the fixed portion 252, It has a head 254 that is disposed on the distal end side of the flexible portion 253 and faces the annular convex portion 225. 12A and 13A to 13C, description will be made assuming that the center position of the hole 231a of the discharge valve 231 coincides with the center position of the through hole 23b of the end face member 223.

  The fixing portion 252 has a hole portion 231a and is a portion fixed to the end face member 223 between the side wall 224a and the side wall 224b of the recess 224. The width of the fixing portion 252 (the vertical width in FIG. 12A) is configured to be slightly smaller than the distance between the side wall 224a and the side wall 224b of the recess 224 in consideration of assembly errors.

  The flexible part 253 is configured to have a narrower width than the fixed part 252 and is a part that bends and elastically deforms when the refrigerant in the compression chamber 22 reaches a predetermined pressure.

  The head portion 254 is configured to be wider than the flexible portion 253, and is a portion that opens and closes the annular convex portion 225 around the discharge hole 223a. The head 254 of the discharge valve 223 is disposed to be inclined with respect to the flexible portion 253. In plan view, one side surface 254a of the head 254 has a first straight portion 255 that is inclined away from the center line of the flexible portion 253 of the discharge valve 231 toward the tip. The other side surface 254b has a second straight portion 256 that is inclined away from the center line of the flexible portion 253 of the discharge valve 231 toward the tip. Further, in plan view, the central portion 257 at the tip of the head 254 is formed in an arc shape with the hole 231a (through hole 23b) as the center.

  As described above, the discharge hole 223a has an elliptical shape. 13 (a) to 13 (c), the discharge valve 231 is disposed in the recess 224 so that the hole 231a faces the through hole 23b of the end surface member 223, and is fixed to the end surface member 223. Although the illustration of some members such as the valve pressing member 32 is omitted, the position corresponding to the top portion 225a of the elliptical annular convex portion 225 is shown by a two-dot chain line. . As shown in FIG. 13 (b), when the center line of the flexible portion 253 of the head 254 of the discharge valve 231 coincides with the major axis of the elliptical discharge hole 223a in the plan view, the discharge valve 231 is the end face. It is considered that the members 223 are properly arranged. When the discharge valve 231 is fixed in this state, since the discharge valve 231 is fixed at an appropriate fixing position (a position where the discharge valve 231 is not inclined), the head 254 has an elliptical annular convex portion 225. It can be closed properly.

  On the other hand, as shown in FIG. 13A, the discharge valve 231 rotates around the hole 231a (through hole 23b) and the first straight portion 255 of the head 254 moves away from the drive shaft 12 in plan view. (When the first straight portion 255 of the head 254 moves from the proper fixing position to the center line side of the discharge valve 231 by a predetermined amount), the side surface of the fixing portion 252 is the side wall 224a, 224b of the recess 224. , The rotation of the discharge valve 131 is restricted. When the discharge valve 131 is in a position where it does not rotate in the above direction, the first straight portion 255 of the head portion 254 faces the top portion 225a on the upstream side in the rotation direction of the annular convex portion 225. When the discharge valve 231 is fixed in this state, the discharge valve 231 is not fixed at an appropriate fixing position, but the head 254 of the discharge valve 231 is fixed in a state of being inclined in a direction away from the drive shaft 12. The annular convex part 225 whose head part 254 has an elliptical shape can be properly closed.

  13C, the discharge valve 231 rotates around the hole 231a (through hole 23b) and the second straight portion 256 of the head 254 approaches the drive shaft 12 in plan view. (When the second straight portion 256 of the head 254 moves from the proper fixing position to the center line side of the discharge valve 231 by a predetermined amount), the side surface of the fixing portion 252 is the side wall 224a, 224b of the recess 224. , The rotation of the discharge valve 131 is restricted. When the discharge valve 131 is in a position that does not rotate in the above direction, the second straight portion 256 of the head 254 is configured to face the top portion 225a on the upstream side in the rotation direction of the annular convex portion 225. When the discharge valve 231 is fixed in this state, the discharge valve 231 is not fixed at an appropriate fixing position, but the head 254 of the discharge valve 231 is fixed while being tilted in a direction approaching the drive shaft 12. The annular convex part 225 whose head part 254 has an elliptical shape can be properly closed.

  Further, as shown in FIG. 13A, when the discharge valve 231 rotates around the hole 231a (through hole 23b) and moves away from the head 254 drive shaft 12, the head 254 One end portion (the lower end portion in FIG. 13) of the central portion 257 of the tip portion faces the top portion 225a on the side away from the through hole 23b of the annular convex portion 225. Further, as shown in FIG. 13C, when the second straight portion 256 of the head 254 moves in a direction approaching the drive shaft 12 by rotating around the hole 231a (through hole 23b), the head The other end portion (the upper end portion in FIG. 13) of the central portion 257 at the front end portion of 254 faces the top portion 225a on the side away from the through hole 23b of the annular convex portion 225. Therefore, whenever the discharge valve 231 is in a predetermined range between the position shown in FIG. 13A and the position shown in FIG. 13C, the central portion 257 of the tip portion of the head 254 is annular. The convex portion 225 is configured to face the top portion 225a on the side away from the through hole 23b. Therefore, the annular convex part 225 whose head part 254 has an elliptical shape can be properly closed. The length of the central portion 257 configured in an arc shape at the tip of the head 154 is such that the discharge valve 231 is inclined when the head 254 moves away from the drive shaft 12 and the head 254 is The length is based on the inclination when moving in the direction approaching the drive shaft 12.

<Characteristics of the compressor of this embodiment>
In the compressor of this embodiment, the same effect as the compressor of the first embodiment is obtained.

  FIG. 12A shows the discharge valve 231 of the compressor of the present invention, while FIG. 12B shows the discharge valve 261 of the conventional compressor. As shown in FIG. 12 (b), the head of the discharge valve 261 has an elliptical shape substantially similar to the shape of the elliptical discharge hole (the top of the annular convex portion), and the elliptical convex portion of the elliptical convex portion. It can be seen that the area of the head 254 of the discharge valve 231 in FIG. 12A is small compared to the case where the area is sufficiently larger than the area of the top.

  As mentioned above, although embodiment of this invention was described based on drawing, it should be thought that a specific structure is not limited to these embodiment. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes meanings equivalent to the scope of claims for patent and all modifications within the scope.

  In the above-described embodiment, the discharge valve rotates within a predetermined range around the fixed hole in the recess, and a portion corresponding to the predetermined range near the center of the tip of the head is a circle centered on the fixed hole. Although it is configured in an arc shape, at least a part of the distal end portion of the head of the discharge valve may be configured in an arc shape centering on the fixed hole in plan view.

  Moreover, in the above-mentioned embodiment, although both the side surfaces of the head of a discharge valve have a linear part, both the side surfaces of the head of a discharge valve do not need to have a linear part. Further, only one side surface of the head of the discharge valve may have a straight portion.

  Moreover, in the above-mentioned embodiment, the length of the 1st linear part of the head of a discharge valve and the 2nd linear part is comprised substantially the same as the length of the part along the major axis of the top part of an elliptical annular convex part. However, the length of the 1st straight part of a head and the 2nd straight part should just be comprised more than the length of the part along the major axis of the top part of an elliptical annular convex part.

  Moreover, in the above-mentioned embodiment, although the discharge valve is being fixed with the rivet with respect to the through-hole of the end surface member as a fixing hole, a discharge valve may be fixed to an end surface member with a fixing bolt. In this case, the fixing hole may be a through hole that is a screw hole of the end face member, or may be a hole that is not a through hole that is a screw hole of the end face member.

  In the above-described embodiment, the upper end of the annular convex portion has a substantially semicircular cross section and is configured to be highest at the center of the annular convex portion, but the upper end of the annular convex portion is a plane. You may be comprised in the same height. In this case, the entire upper end of the annular protrusion is the top of the annular protrusion.

  Further, in the above-described embodiment, when the discharge valve rotates around the hole and one side surface of the head moves by a predetermined amount in one direction, at least a part of the side surface of the discharge valve is on the side wall of the recess. The case where one side of the head faces the top on the upstream side in the rotation direction of the annular convex portion has been described, but the discharge valve rotates around the hole so that one side of the head is in one direction. The same applies to the case where at least a part of the side surface of the discharge valve abuts against the side wall of the recess and the one side of the head faces the upstream portion of the annular convex portion in the rotational direction when moved by a predetermined amount. The effect is obtained. For example, as in the above-described embodiment, when the upper end of the annular convex portion has a substantially semicircular cross section and the central portion of the annular convex portion is the highest apex, one side surface of the head is annular convex. The same effect can be obtained even when facing the outer portion of the portion on the upstream side of the rotational direction of the portion (including the case of facing the outer peripheral end of the annular convex portion). Further, as described above, when the upper ends of the annular protrusions are flat and are configured at the same height, the entire upper end of the annular protrusion is considered to be the top of the annular protrusion, and the head The same effect can be obtained even when the one side surface of the annular convex portion opposes any portion of the upstream portion of the annular convex portion in the rotational direction (including the case of facing the outer peripheral end of the annular convex portion).

  Further, in the above-described embodiment, when the discharge valve rotates around the hole and one side surface of the head moves by a predetermined amount in one direction, the side surface of the discharge valve fixing portion contacts the side wall of the recess. Although the case where the rotation of the discharge valve is regulated by contact is described, at least part of the side surface of the discharge valve (for example, the flexible portion or the head of the discharge valve) abuts the side wall of the recess, The rotation of the valve may be restricted.

  By using the present invention, a compressor capable of properly closing the discharge hole at the head of the discharge valve even when the discharge valve is inclined due to assembly and suppressing the deterioration of the followability of the discharge valve can be provided. Can be provided.

DESCRIPTION OF SYMBOLS 1 Casing 2 Compression mechanism 3 Drive mechanism 21 Cylinder main body 22 Compression chamber 23, 123, 223 End surface member 23a, 123a, 223a Discharge hole 23b Through-hole 24, 124, 224 Recess 25, 125, 225 Annular convex part 31, 131, 231 Discharge valve 31a, 131a, 231a Hole 33 Rivet 52, 152, 252 Fixed part 53, 153, 253 Flexible part 54, 154, 254 Head

Claims (7)

A cylinder body having a compression chamber;
An end face member attached to the end face of the cylinder body,
The end surface member has a concave portion in which a discharge valve is disposed on a surface opposite to the cylinder body,
In the recess,
A discharge hole communicating with the compression chamber;
A fixing hole for fixing the discharge valve;
An annular projection formed around the discharge hole, and
The discharge valve is
A fixing portion fixed to the end face member through a hole facing the fixing hole;
A flexible portion extending from the fixed portion;
A head that is disposed on a distal end side of the flexible portion and opens and closes the annular convex portion;
A compressor characterized in that at least a part of the tip of the head in a plan view is configured in an arc shape centered on the fixed hole. In a state before the discharge valve is disposed in the recess and fixed to the end face member,
The discharge valve rotates within a predetermined range around the fixed hole in the recess;
2. The compressor according to claim 1, wherein a portion corresponding to the predetermined range near a center of a tip portion of the head is configured in an arc shape with the fixing hole as a center. In a state before the discharge valve is disposed in the recess and fixed to the end face member,
In plan view, when the discharge valve rotates about the fixing hole and one side surface of the head moves by a predetermined amount toward the center line side of the discharge valve, at least a part of the side surface of the discharge valve is 3. The compressor according to claim 1, wherein the compressor is in contact with a side wall of the concave portion, and the one side surface of the head portion is opposed to a portion on the upstream side in the rotation direction of the annular convex portion.   The compressor according to claim 1, wherein at least a part of a side surface of the discharge valve is a side surface of the fixing portion.   The compressor according to any one of claims 1 to 4, wherein at least one of both side surfaces of the head has a straight portion.   The compressor according to claim 1, wherein the discharge hole has an elliptical shape.   The compressor according to claim 1, wherein the fixing portion is fixed to the end surface member by a rivet.

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